Multi-radio Platform Interference Mitigation via Dynamic Power Control
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Solution Overview
Problem
Multi-radio wireless communication devices face interference issues between co-located transceivers, such as WiMax and Bluetooth, leading to packet loss due to collisions, especially when their frequency spectrums overlap, degrading communication performance.
Innovation Solution
A coexist controller coordinates the operations of longer-range and shorter-range radio modules by managing transmission power levels and enabling step-down or transmit-kill modes based on reception status, using a link management protocol to ensure interference mitigation and optimal coexistence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If WiMax and Bluetooth transceivers operate simultaneously with full transmission power, then communication coverage and data rate are maximized, but interference between co-located transceivers causes packet loss and degrades communication reliability
Solution Approach 1:
The patent implements dynamic transmit power adjustment for the Bluetooth transceiver based on WiMax reception status. The coexist controller continuously monitors WiMax reception and dynamically modifies Bluetooth transmit power levels, switching between full power, reduced power, and zero power states to optimize both communication reliability and interference mitigation in real-time
Solution Approach 2:
The patent introduces a coexist controller as an intermediary component that mediates between the WiMax and Bluetooth radio modules. This intermediary monitors the operational status of both transceivers and coordinates their activities, implementing power adjustment and transmission scheduling to prevent interference while maintaining communication effectiveness
2Reliability
If Bluetooth transmission power is reduced to mitigate interference, then packet loss from collisions decreases, but Bluetooth communication range and effectiveness are degraded
Solution Approach 1:
The patent implements dynamic transmit power adjustment for the Bluetooth transceiver based on WiMax reception status. The coexist controller continuously monitors WiMax reception and dynamically modifies Bluetooth transmit power levels, switching between full power, reduced power, and zero power states to optimize both communication reliability and interference mitigation in real-time
Solution Approach 2:
The patent employs periodic transmission scheduling where Bluetooth transmissions are temporarily suspended or power-reduced during specific time intervals when WiMax reception is active. This periodic action pattern allows Bluetooth to operate at full power during non-conflicting periods while mitigating interference during critical WiMax reception windows
Data Source
AI summary
Embodiments of a multi-radio platform with longer-range and shorter-range radio modules and method are generally described herein. Other embodiments may be described and claimed. In some embodiments, a transmit power level is set for transmissions by a shorter-range radio module during a reception by a longer-range radio module to a lesser of a maximum allowed power level or a next requested power level when transmit step-down mode is enabled. The transmit power level is set to the next requested power level when the longer-range radio module is not transmitting. The shorter-range radio module refrains from transmitting when a transmit-kill mode is enabled during the reception by the longer-range radio module.